Packing.



PATENTED DEG. 13, 1904.

A. L. OGLE a if. L. SAGKETT;

FAKIN APPLICATION FILED MAY 15, 190s.

No MODEL.

WTNEE 55.5; @QM/QM @WQ Calm, @5MM-WM :Patented December 13, 1904i.

rrr f PATENT ALBERT L. COLE, CF AUBURNDALE, AND JASPER L. SACKETT, CE MELROSE, MASSACHUSETTS.

PAIKING...

SPECIFICATION forming part of Letters Patent No. 777,275, dated December 13, 1904.

Application filed May 15,1903. Serial No. 157,215. (No model.)

To all 'wh/om t may concern;

Be it known that we, ALBERT L.Y CoLn, residm g at Auburndale, and JASPER L. SAoK'n'rT,

4residing at Melrose, in the county of Middlelication, reference being had therein to the accompanying drawings.

Our invention relates to packings for pistons, pumps, valves, and for other uses to which packings may be applied, and is embodied in a novel form of packing' consisting of a mass of strands covered or bound together by a covering' or binding', each strand being composed of flax or other fibrous material saturated with a lubricant and enveloped in soft antifriction metal. y 1

The object of our invention is to secure a packing in a convenient form which is ellicient and durable and so elastic as to respond to the variable pressure of the moving parts.

A further object is to produce a packing which may be readily applied, which will not harden and form into a mass after being used, and which can be easily removed one ring at a time when worn out.

The following is a clear description of our invention, reference being made tothe accompanying drawings, in which- Figure l is a vertical transverse section of a stul'lng-box, showing the application of the packing to a piston-rod. Fig. 2 is a view in perspective of the packing' in ring form, having a portion cut away to show the packing' in cross-section. Fig. 3 is a transverse section of a modification, and Fig. 4c is a detail View showing' the construction of the strands.

Similar letters refer to similar parts throughout the several views.

In the drawings, A designates the core of the packing', which is made up of the strands t a, and B represents the covering which holds the core.

Uur packing` is made by taking a fibrous string of flax, hemp, jute,.asbestos, or some Vother similar fiber, drawing it through a solution of plumbago or other lubricant and then winding about it a soft antifriction metal in such a manner as to envelop it completely. ln Fig. 4, which illustrates this, f/f' is the iiax string', and ai is the metallic ribbon wound closely about the string, thus Aforming themetallic strand a. The core A is built up of the strands a a in the ring packing by winding' on a lathe or in any other suitable manner and in the sheet form by laying out the strands in substantial parallelism. When the core Alias been built up somewhat larger than the desired. size, it is placed in a suitable mold and pressed compactly together, which makes the core compact andv uniform and reduces it to the proper size. ln case a packing with great lubricating power is desired, when the core A is beingI formed the spaces between the strands may be lilled in with graphite or other lubricant; but for the ordinary packing' this is unnecessary,`sincc the llibrous material of the strands contains a lubricant andthe enveloping material is an antifriction metal. Afterthe core A has been completed it is enveloijied in the covering B, which may be of any suitable material, the most preferable covering, however, being' a rubber composition thoroughly impregnated with graphite. This covering B maybe made of varying' thickness to suit dilferent uses. "We have found it advantageous to make it heavier on the outer surface ofthe ring, as it serves the purpose of a cushion or spring acting against the side of the stelling-box to keep the packing pressed against the working parts. ln the case of packing' designed for use in ammonia or air compressors where great elasticity and spring are necessary the covering is made especially heavy on the outer surface. On theuupper and lower surfaces the covering is generally made` thin andthe inner surface, which bears against the piston-rod, is felt uncovered in order that the working parts may have a metal contact with the packing.

ln Eig. 3 is shown a modilied form of our packing containing a strip of the covering material vertically dividing Athe core A,'the purpose of this modification being to secure more elasticity and spring in the packing'.

The packing' is finally completed by vulcanizing and is then ready for use. lll/'hen made in ring form, it is cut diagonally on the line X, as shown in Fig. 2, to permit the packing to be opened and snapped around the pistonroc.

Fig. l illustrates the application of the packing in ring form to the piston-rod C, the packing being placed Within the stuiiing-box D and compressed against the piston-rod by the gland E, operated by the stud-bolts F F. The packing is here shown as made in a set of four rings having beveled faces to correspond to the configuration of the stuiiing-box, thus completely illing up the stuiing-box and securing a uniform pressure on all parts of the piston-rod Whenv the gland E is adjusted. Furthermore, the packing when so constructed operates to form a continuouslyT tight and uniform joint from the top to the bottom of the stuffing-box, which adds much to the life and eiiiciency of the packing.

Our packing may be made in many different forms and sizes, it being necessary to provide a suitable mold only, and When made in sheet form gaskets of any size or form may be stamped out. scribed are of substantial utility and constitute a feature of the invention, it is not intended to limit the invention to any particular shape or form of packing, since such shape does not constitute the material part of the inventionmhich is the combination of strands of fiber developed in metal With a cover to form a homogeneous structure, and We desire to claim our invention in the broadest manner legally possible.

What We claim is 1. A packing constructed with a cover of a composition of rubber and graphite, inclosing a series of parallel strands of flax, each strand of flax being Wound with and completely en- While the forms above developed in a soft-metal or alloy ribbon; the Whole being' pressed and vulcanized to form an integral body.

2. A packing consisting of a body or mass of parallel strands extending lengthwise of the body, said strands being made of flax Wound With a soft-metal or alloy ribbon in such amanner as to envelop completely the flax with the soft metal or alloy, combined with a covering of a composition of rubber and graphite; said body and said covering being pressed and vulcanized to form an integral body.

3. In a packing, the combination of a body or mass of parallel strands, each strand being composed of iiax Wound With and completely enveloped in a soft-metal or alloy ribbon, and a covering of a composition of rubber and graphite which envelops all sides of the said body of strands except that side which comes into contact with the moving parts; said body and said covering being pressed and vulcanized to form an integral body.

4:. In a packing, a body or mass of parallel strands, said strands being composed of flax completely enveloped in a'ribbon of soft metal, in combination with a covering of a composition of rubber and graphite Which surrounds said mass of strands on all sides save the surface to be presented to the moving parts; said mass and said covering being pressed and vulcanized to form a homogeneous body.

In testimony whereof We affix our signatures in the presence of two Witnesses.

ALBERT L. COLE.

JASPER L. SACKETT.

Vitnesses:

WINTHROP L. INIALooN, FRANK J. STILEs. 

